Type-writer attachment.



w. A. TOMPKINS, TYPE WRITER ATTAGHMBNT.. APPLICATION PI'LED we. 26,19:05. v w I v Patented Oct. 26, 1909.

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W. A. TOMPKINS. TYPE WRITER ATTAUHMEN'I APPLIQATION .PILED AUG. 26.1905.

Patented 0011261909.

2 SHEETS-$111131 2.

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TYPEFWRITER ATEEEHMEHQ.

i-peciiileatlon of Letters Patent.

Patented Qct. 26, 1909..

1 all it lie it known that l, l' v sesrsn A... Tome- Inn at men of theUnited States, residing at Poiend, in. the county or ll fllnltnomah andState of Oregon, have invented certain useful improvements in Type Writr Attachments; and i do hereby declarc the tollowing to be a'full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, re erenc'e being had to the accompanying drawings, and to theletters and figures of reference marked thereon, which form a part ofthis snecification.

This invention relates to new and useful improvements in attachments fortypewriters for operating the same electrically, and comprises meanswhereby as a slight pres sure is applied to a key, a type bar may beactuated and thrown against the platen, and also in the provision ofelectrical means for rotating the platen, spacing the lines andactuating escspeinent mechanism.

My invention consists in various details of construction and incombinations and errang'enicnts of parts which will be hereinafter fullydescribed and then specifically defined in the appended claim.

I illustrate my invention in the accompanying drawings, in which Figurel is a vertical sectional view through a typewriter, showing myattachment as applied thereto. Fig. 2 is a perspective diagrammaticview, showing a key and type carrying lever and immediate connections. F3 is an enlarged detail view of a slightly modified form of means foractuating the rock shaft carrying the type bar. Fig. i is a sectionalview, showing at slightly modified form of the key attachment. Fig. 5 isa perspective View of means for actuating the platen. Fi 6 is a detailsectional view through a key showing electrical connections therewith. 7is an elevation of the platen actuating mechanism, showing electricalcircuit whee connected therewith, and Fig. 8 is a detail sectional viewthrough the solenoid forming a part of the platen actuating mechanism.

Reference now being lied to the details of h characters, it designatesan estriter frame, having a bank l1 which supported en lo the lower endof which is lv (36311: to a crank em:

is nits-iii to a rock shaft C. Each of said shafts 0, there being onefor each type or character, has a crank arm C, having connection bymeans of the rods D and D with an an led type-carrying lever E. Saidrods D an D are connected to ether by means of a turn hackle D whereliyany wear may be taken up. 'Said typewriter ma be of any of thewell-known makes, provi ed with a platen F against which the type leverE is adapted to strike as the outer ends of the levers E are tilteddown.

Referring to Fig. 1 of the drawings, it will be note that the keys aremade up of two sections, desi 'nated in the drawings by letters G and G,the former of which is fastened to the rods 13, and the latter hinged tothe key section G at one side. A spring ll-serves to normally hold thetwo key sectio n separated, and each of said sections is provided with acontact noint g, which, as the key section G is depressed, may be throwninto contact with a point on the lower key section, for the purpose ofclosing the electric circuit.

In Fig. 1 of the drawings, it will be noted that the positive andnegative wires of the lower circuit, which Wires are designated,respectively, by letters I and l, are connected, one to the lower keysection, and the other to the upper key section, and said wires are alsoconnected to the two poles of the solenoid K, which is mounted upon anon-conducting strip L. Said solenoid'li is also connected electricallyby means of wires 1 and I with the battery J. The core or plunger N ofthe solenoid is pivi'itally con nected to a crank arm 0, fixed to therock shaft C, and every time the circuit is closed, said core, which isof soft iron, will be energized and actuated longitudinall for thepurpose of rocking the shaft 0, an through its connections cause atype-carrying lever to be actuated. there are as many solenoids as thereare keys, and each similarly connected electrically, as described.

Referring to Fig. 3 of the drawings, I have shown a slight modificationof the elec trical means for rocking the shaft, in which i provide anordinary relay Q which is mounted upon a. rod Q, which in turn ispivotall y connected to the crank arm fixed to rock shaft C, and saidrod Q. is adnotcd to pass through an insulating bushing Ll? held in holein the plate M, which E carried by the it will be understood that latteris oi metal and forms a common field For all'of the various magnets,onlyone of the latter, however, being shown in Fig. 3 of the drawings.Each magnet is connected by means o'l a wire .M' with a battery M andeach time the circuit is closed by the depression of a key, thennrgnet'n'ill be thrown toward the plate or tield M and cause thesha'l't to rock.

In Fig. is of the drawings I have shown a solenoid it, having a core R.which is connected with a rod lt'-, which in turn is connected to thetiltiugplaten actuating handle t t' aid solenoid It is somountcd upon apivot 'l-l that it will have a thrusting movement to allow for themovements of the platen handle H in rotating the platen, spacing tor thelines and the returning of the carriage as in the Smith lremiertypewriters.

Roth-ring to Fig. at of the drawings, I have shown aslight'.modification of key attaelnuent, in which a rubber cap 'l. is pro-\-'ided, which may be easily slipped over the key of an ordinarytypewriter, and carries a contact point.- 'I", having an electrical wire'l" conherted thereto, while to the ordinary key is 't'astened a contactpoint to which an electrical wire W 2 is connected. Under thepressure'ot an operators finger, the contact may be made by the elasticwall of the cap \;'iel ling, and after pressure is relieved,

the circuit will break by the top of the cap returning to its normalposition. .By this construction an ordinary typewriter may be equippedwith my electrical apparatus.

in l igs.-7 and 8 of the drawings will be seen a key ll carrying acontact point 12 which is designed to be depressed against .a contactpoint 13 which is electrically connected through the medium of the wire1% with the, battery M and also electrical connections through the wires15 and 1G'vv1t-h thefreepective poles of the solenoid R for rotatmg theplaten F and spacing the lines as in the Smith Premier, the carriagereturn lever 6 also rotates the platen by means of a pawl which itcarries and which engages the two ratchets O on the end of the platenroll. The carriage return lever being journaled to the carriage, a qulckthrust of the solenoid connecting rod R acting in the directionof thearrow (Fi 8 of the drawings), will first rotate the platen as itgradually overcomes the latent inertia of the carrier.

By the provision ofthe apparatus shown and described, it will be notedthat a simple and etiicient means is provided, whereby a f s0 slighttouch without any appreciable pressure, satin-lent only to closethccircuit, Wlll snt'lice to provide a constant and evenstroke to thehammers, making wax coated stencils and avoiding too heavy a strokewhich would cut out the center of the letter, or a too light strokewhich would not break suiticiently to allow for a free flow of ink.

\Vhile I have shown a particular 'form of electrical apparatusillustrating my invention, it will be understood that I. may yary thedetailed COIlStI'IlCtlOll of the same, it desired, without in any waydeparting from the spirit of the invention.

Having thus fully described my invention, I

what I claim as new and'desire to secure by Letters Patent, .is

In a typewriter, the combination of a rock shaft, a series of typecarrying levers, conneetions between the same and said shaft, a

solenoid having a core pivotally connected to and adapted to rock saidshaft or actuate said key levers, a battery in circuit with saidsolenoid, key sections having contact points,

and electrical connections between said sections and the solenoid, aplaten, a'member tor actuating said platen, asolenoid, a core of saidsolenoid positively connected to said" platen actuating member, acircuit closer and electrical connections between the same .i

and said solenoid, as set t'o'rth.

In testimony whereof I hereunto afiix my signature in the presence oftwo witnesses.

\VEBSTER A. TOMPKINS. \Vitnesses O. G. BUCHANAN, VIRGIL CooMnR.

